In order to achieve higher processing safety when improving cutting parameters, the requirements for wear resistance are clearly higher than the requirements for toughness. Therefore, in order to make the blade harder, consider using ISOP20 insert grades in steel mold applications. This is to avoid premature breakage of the cutting edge and to achieve higher cutting parameters. In order to further improve the cutting performance, it is generally considered that no coolant is used in the milling of steel molds. Since high cutting rates are commonly used today, even if the amount of coolant is large, it is difficult to have a significant influence on the cutting edge, so dry milling should be used. Most of the coolant is evaporated during wet cutting, and the remaining coolant can only intermittently cool the blade as it enters and exits. At this point, the change in heat is amplified, which can have a worse impact on the blade than the actual high temperature. Modern coating grades are designed for high-speed milling of steel, providing high safety without the need for coolant at high cutting speeds and high feed conditions, but most grades are good under both dry and wet processing conditions. Work. High speed and high feed mean more heat. However, the use of steel milling grades such as GC4220 will not be a negative factor. It is an ISOP20, CVD coated grade designed to achieve maximum performance with high cutting parameters. Some processes require higher productivity than versatile requirements, and therefore require higher wear resistance. Perhaps this is one of the ways to deal with harder steel. Therefore, the heat-related wear mechanism becomes a more prioritized problem and requires a grade that can withstand such cutting edge breakage. The GC4220 is the first choice for cutting time with higher cutting speeds. It has a wide range of applications and is even the optimizer for many steel mold materials and is a good choice for cast iron milling with high heat problems. Faster feed and higher speed in the depth of the cut Today, in many mold shops, the trend in CNC milling is to use higher feed rates and smaller depths of cut after roughing. This is good for the machine tool, which improves the machining results. Power limitations are also an increasing factor to consider, especially on machining centers with tapers of ISO 40 and 30. The higher speeds and feeds of today's machine tools also mean the ability to use small diameter milling cutters more efficiently and to cut shoulders and end faces by repeated passes. These factors help to set the direction for the development of a new generation of shoulder milling cutters. Therefore, in the new CoroMill milling cutter series, the maximum depth of the CoroMill490 milling cutter should be at a lower value: 5.5mm, the recommended value is 4mm. This also provides an opportunity for a new square shoulder milling cutter with a square insert, while still passing Precise and safe blade positioning is the basis for high blade stability and good tool economy. The CoroMill 490 insert has optimized the blade support points and placed them as far apart as possible along the edge of the seat, minimizing the effects of cutting forces that easily move the blades on the seat. A small depth of cut tends to amplify the lever effect with a blade Screw compared to a long cutting edge radial knife. However, the structure of CoroMill 490 compensates for this, which guarantees high stability. High stability is a prerequisite for large feed per tooth, consistent high precision and surface quality, and long tool life. In some applications, the ability to machine large diameters is critical to the design requirements of the part, requiring a wide range of milling cutters, custom or dedicated blade radii. The CoroMill 490 insert has a nose radius of between 0.4 and 1.6 mm and is suitable for finishing to roughing applications in shoulder milling. For the CoroMill 490's ability in high-speed machining, the successful development of the unique, new parallel forging used in the insert is one of the key innovations. This type of tool has been proven to achieve the best removal rate per unit of power. in conclusion With the continuous development of various cutting tools, milling has taken a new level in the performance of high-speed cutting, using new indexable insert end mills to improve the cutting capacity of high-speed and high-feed aluminum molds. The new indexable tool is based in part on a new blade-to-tool interface that secures the blade at high spindle speeds. The interface innovation between the new tool body and the interchangeable tool cutting head is optimized in two ways, taking the cutting performance of the solid carbide tool to a new level. The development of the new coated carbide insert grade directly affects the durability of the insert at high cutting speeds. New developments in square shoulder milling with indexable inserts have opened up new horizons for milling in mold making. Previous page
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